<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>index</title>
  <link rel="stylesheet" href="./css/index.css">
</head>
<body>
  <div class="box">普通盒子</div>
  <div class="foo">另一个新的盒子</div>
  <div>添加了无类名的盒子</div>
  <p>这是冯誉添加的文字</p>
  <p>11111</p>
</body>